Start of a Sublime syntax file Gherkin

gherkin.sublime-syntax

%YAML1.2
---
# See http://www.sublimetext.com/docs/3/syntax.html
file_extensions:
  - feature
scope: source.feature
contexts:
  main:
    - match: '"'
      scope: punctuation.definition.string.begin.feature
      push: double_quoted_string

    # Note that blackslashes don't need to be escaped within single quoted
    # strings in YAML. When using single quoted strings, only single quotes
    # need to be escaped: this is done by using two single quotes next to each
    # other.
    - match: ''''
      scope: punctuation.definition.string.begin.feature
      push: single_quoted_string

    # Comments begin with a '#' and finish at the end of the line
    - match: '#'
      scope: punctuation.definition.comment.feature
      push: line_comment

    - match: '<[^>]+>'
      scope: string.quoted.single.feature

    - match: '^\s*\|.+$'
      scope: entity.name.tag.section

    - match: '^\s*@\S+$'
      scope: entity.name.tag

    - match: '^Feature:'
      scope: keyword.control.feature
      # push: feature_def

    - match: '^\s*(Scenario|Scenario\s+Outline):'
      scope: keyword.control.feature

    - match: '^\s*(Examples|Background):'
      scope: keyword.control.feature

    - match: '^\s*(Given|Then|When|And|But)\s+'
      scope: keyword.control.feature

    # Numbers
    - match: '\b(-)?[0-9.]+\b'
      scope: constant.numeric.feature

    # Brack balancing
    - match: '<'
      push: brackets
    - match: '>'
      scope: invalid.illegal.stray-bracket-end

  single_quoted_string:
    - meta_scope: string.quoted.single.feature
    - match: ''''
      scope: punctuation.definition.string.end.feature
      pop: true

  double_quoted_string:
    - meta_scope: string.quoted.double.feature
    - match: '"'
      scope: punctuation.definition.string.end.feature
      pop: true

  line_comment:
    - meta_scope: comment.line.feature
    - match: $
      pop: true

  tag:
    - meta_scope: entity.name.tag
    - match: $
      pop: true

  # feature_def:
  #   - meta_scope: comment.block.documentation.feature
  #     meta_include_prototype: false
  #     match: '^\s*$'
  #     pop: true
  #     # ^\s*[\n\r\f]

  brackets:
    - match: '>'
      pop: true
    - include: main

A bit stumped on matching the termination of the Feature: block